Quick question about a replacement stock cat. Was browsing around EBay and found this:

MagnaFlow Heavy Metal Catalytic Converter 99306HM - eBay (item 370481743610 end time Mar-07-11 02:22:24 PST)

Is that an appropriate replacement for my stock cat or can a better deal be had? Not looking at a highflow cat atm, just want to make sure the stock cat is in good condition for now.